The term 'Evil Empire' was used by President Ronald Reagan in the 1980s to describe the Soviet Union and its oppressive policies. This phrase characterized the USSR as a major adversary in the Cold War, emphasizing its role in promoting communism and human rights abuses while framing the United States as a defender of freedom and democracy. The label helped solidify Reagan's foreign policy approach, which included a military buildup and initiatives like the Strategic Defense Initiative (SDI).